Six open-source frameworks and utilities for AI agents launched in a single day: Sgai (goal-driven multi-agent code generation), Framework for building multi-agent research systems, Memograph CLI (agent memory diagnostics), MCPSpec (MCP server testing without boilerplate), ContextVM (MCP over Nostr), and Context Mode (MCP output compression for Claude). All are open-source with implicit B2B SaaS pathways (managed hosting, enterprise CI/CD integration, cloud execution layers). Gap: none of these solve end-to-end agent observability or cost attribution at scale—each addresses a micro-layer.